Janey all I can tell you is that Heucherella is a hybrid between Heuchera and Tiarella .. I'm not sure that I could tell the difference they look so much alike I know a Heuchera is a Coral Bells the one we all know with a tall stem and bright pink bells the Tiarella has foamy flowers with a tall stem like the coral bells but the tiny flowers are shaped more like a star rather than bells , I'm confusing myself now LOL ...
Thanks Kat :o)

Thanks everyone I'm glad you liked it as much as me , and a special thanks to Janey for such a lovely gift :o) I suspect they keep genetically changing breeding and modifying plants to make them more popular Janey ,these are colours we never use to have aren't they ....